1 . 如图,在边长为
(
为自然对数的底数)的正方形中随机撒一粒黄豆,则他落到阴影部分的概率为______ .(图中曲线为
和
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eae1b87c23b45ce5e5e74d5b1d73234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572001155366912/1572001161109504/STEM/388fb370-bc89-4acb-842c-0272ba4fb6fc.png?resizew=180)
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2 . 如图所示,在边长为1的正方形
中任取一点
,则点
恰好取自阴影部分的概率为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572701994221568/1572702000349184/STEM/d6d7aa52d0d44d9b9c65b9ad4cc1fb1e.png?resizew=160)
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名校
3 . 向图中边长为2的正方形中,随机撒一粒黄豆,则黄豆落在图中阴影部分的概率为
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572029303799808/1572029309419520/STEM/986a8cb00bc842bc96681784ffbd0c4c.png?resizew=142)
![](https://img.xkw.com/dksih/QBM/2015/3/25/1572029303799808/1572029309419520/STEM/986a8cb00bc842bc96681784ffbd0c4c.png?resizew=142)
A.![]() | B.![]() |
C.![]() | D.![]() |
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